source: [lemma=us] □ □
destination: [lemma=us] [□] □
spec: Part 7 sets the minimum essential information required in an ERAP summary . Moreover , this data set will allow us to continue monitoring the motions of the inner moons , which have been found to show possibly chaotic orbital variations ; by nearly doubling the time span of the existing ACS astrometry , the details of the variations will become much clearer .